Funding round
Radiant Nuclear Series B
Radiant Nuclear, which works in nuclear microreactor development and manufacturing in El Segundo, raised $40M in a Series B round announced on 1 Apr 2023, led by Andreessen Horowitz. 5 firms took part. It is Radiant Nuclear's second venture round on record; the one before was a Series A in Feb 2023.
$40M
Amount raised
Not disclosed
Post-money valuation
5
Investors
1 lead
Valuation
What this round says about the price
Radiant Nuclear did not disclose a valuation in this round. It came 2 months after Radiant Nuclear's Series A. It is 7.7% of the $518M Radiant Nuclear has raised in the venture rounds on record. Radiant Nuclear raised again 25 months later: a Series C round of $165M in May 2025. Its next priced round, a Series D in Dec 2025, valued it at $1.80B.
Radiant Nuclear's funding rounds
Radiant Nuclear has 4 venture rounds on record. This one is highlighted.
Investors
Who put money in
Andreessen Horowitz led the round with 4 other firms.
Lead investor
- Andreessen Horowitz backs 722 venture-backed companies new investor
Also in the round
- Founders Fund backs 368 venture-backed companies new investor
- backs 36 venture-backed companies new investor
- backs 77 venture-backed companies new investor
- Draper Associates new investor
Comparable rounds
How it compares
The closest in time: 2 in Electric Supplies & Power Generation, then Series B rounds in any sector within 6 months:
| Company | Announced | Amount | Post-money | Led by |
|---|---|---|---|---|
| Electric Supplies & Power Generation | 24 Apr 2023 | $96M | $600M | Wellington Management |
| Electric Supplies & Power Generation | 18 Apr 2024 | $27M | not disclosed | Blue Earth Capital |
| Clear Street Financial Services | 11 Apr 2023 | $270M | $2.00B | Prysm Capital |
| Medical Supply Manufacturers | 19 Apr 2023 | $150M | not disclosed | SoftBank Vision Fund and Prosperity7 Ventures |
| Electronical Components Manufacturing | 26 Apr 2023 | $120M | not disclosed | Export Development Canada and McRock Capital |
| Cryptocurrency | 4 Apr 2023 | $120M | $3.00B | not named |
| Pharmaceutical Products | 20 Apr 2023 | $110M | not disclosed | venBio |
| Tech Companies | 26 Apr 2023 | $100M | $750M | Andreessen Horowitz |
Sources
Where this comes from
Reported by 1 source.
Questions
Frequently asked
How much did Radiant Nuclear raise in its Series B round?
Radiant Nuclear raised $40M in its Series B round, announced in Apr 2023.
Who led Radiant Nuclear's Series B round?
Andreessen Horowitz led it, with Founders Fund, Cantos, Boost VC and Draper Associates.
What was Radiant Nuclear's valuation at the Series B round?
It was not disclosed.
Did Radiant Nuclear raise again after this round?
Yes: a Series C round in May 2025 of $165M.